The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1991
Filed:
Jan. 29, 1990
Wilbur A Janssen, New Lenox, IL (US);
Formax, Inc., Mokena, IL (US);
Abstract
An improved drive linkage for a reciprocating mold plate in a food patty molding machine includes, in series, a hydraulic cylinder and its piston; one is connected to a motor or other prime mover and the other to the mold plate. Three hydraulic lines connect the opposite ends of the cylinder to a large hydraulic reservoir and to each other. A hydraulic pressure flow directing means, preferably comprising check valves in the hydraulic lines, produces a continuous, unidirectional flow of hydraulic fluid from the reservoir into one end of the cylinder, on to the other end of the cylinder, and then back to the reservoir; the flow remains unidirectional despite cyclic reversal of the direction of piston movement in the cylinder.